Respiration - Human Gaseous Exchange
Choose the best suitable answer for the following questions(15marks)
- 1.
Name Structure A, B & CDiagram 1: Overview of Respiratory System- A.
Trachea, Larynx, Bronchus
- B.
Larynx, Trachea, Pharynx
- C.
Pharynx, Larynx, Trachea
- D.
Trachea, Larynx, Pharynx
- 2.
Name Structure D and EDiagram 2: The Left Lung
- A.
Bronchiole, Bronchi
- B.
Alveoli, Bronchus
- C.
Bronchi, Bronchiole
- D.
Bronchus, Bronchiole
- 3.Structure F is well adapted for its function of ___________________.
- A.
Aerobic Respiration
- B.
Gaseous Exchange
- C.
Anaerobic respiration
- D.
Inhalation
- 4.Movement of air in and out of the lungs is due to ______________.
- A.
Diaphragm contracts and flattens
- B.
Inhalation & Exhalation
- C.
Difference in pressure
- D.
External intercostal muscles contract and internal intercostal muscles relax
- 5.Which of the following statements is TRUE
- A.
Only diaphragm, intercostal muscles and sternum, is involved in inhalation and exhalation
- B.
During inhalation, external intercostal muscles relax and internal intercostal muscles contract.
- C.
Sternum move upward and forward exhalation.
- D.
Changes of the volume of cavity are workings of only the intercostal muscles and diaphragm.
- 6.Which of the following statements is FALSE
- A.
C-shaped rings of cartilage are specialized structures of the trachea
- B.
Glands cells secreting mucus help trap dust particle in the trachea
- C.
Cilia in the trachea helps in breathing, to sweep air into the lungs and
- D.
Heart is found in the thoracic cavity
- 7.Concentration of oxygen is __________ in the lungs and __________ in the tissues.
- A.
High, low
- B.
Low, high
- C.
High, high
- D.
Low, low
- 8.
CO2 + H2O H2CO3H+ + HCO3-The reaction above take place in the red blood cell. Infer what happens when the red blood cell is in an area of high concentration of CO2
- A.
The reaction move to the right
- B.
The reaction move to the left
- C.
The reaction remains unchanged
- D.
The red blood cell shrink
- 9.
From the equation CO2 + H2O H2CO3H+ + HCO3-____________ is the enzyme which catalyze the formation of _______________.
- A.
Carbonic catalase, carbonic acid
- B.
Carbonic anhydrase, carbonic acid
- C.
Carbonic catalase, hydrogencarbonate ions
- D.
Carbonic anhydrase, hydrogencarbonate ions
- 10.Which of the following does not describe the adaptations of a Red Blood Cell?
- A.
Biconcave shape
- B.
One cell thick
- C.
Contains haemoglobin
- D.
Have an iron-containing structure
- 11.Which of the following statements is FALSE
- A.
Alveoli is well supplied with blood capillaries.
- B.
Alveoli walls is one cell thick which increase the rate of diffusion of gases.
- C.
A thin film of moisture covering the surface of the alveolus allows membranes to slide over each other easily during breathing.
- D.
Numerous alveoli help increase surface area to volume ratio facilitates exchange of gases.
- 12.What are the common effects of Emphysema and Chronic bronchitis?
- A.
Surface area for gaseous exchange decreases
- B.
Excessive mucus is secreted by the epithelium
- C.
Airway block making breathing difficult
- D.
None of the above
- 13.Carbon monoxide is a chemical found in tobacco smoke. It is known to reduce the efficiency of transportation of oxygen in the red blood cell. 'Infer, which structure is affected by carbon monoxide in red blood cell.
- A.
Shape
- B.
Nucleus
- C.
Haemoglobin
- D.
Thin walls
- 14.
Analyze the experimental setup below.What is the experiment investigating?
- A.
The amount of oxygen in inspired air different from expired air
- B.
The water content in inspired air different from expired air
- C.
Is temperature of inspired air different from expired air
- D.
The amount of carbon dioxide in inspired air different from expired air
- 15.Which of the following statements is TRUE
- A.
Tar is a additive drug found in tobacco.
- B.
Number of cigarettes smoked per day is indirectly proportional with the risk of lung cancer
- C.
Carbon monoxide in tobacco increase the risk of fatty deposits in walls of arteries.
- D.
None of the above
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